O-Trail is a free platform for trail runners that brings race planning, results and personal performance tracking together in one place. Its goal is to make every race and every time count, helping runners follow their trail-running journey over time. The site offers a searchable calendar of upcoming events, with race dates, locations, distances and elevation gain, as well as results and full rankings after races.

Runners can build a record of their achievements, view their history and compare performances using scores, ELO ratings and a difficulty index that factors in distance, elevation gain and technical demands. Community features let users follow friends and rivals, discover other runners, share comments and collect badges by taking on challenges. O-Trail brings together information on thousands of events and editions, from short, accessible races to mountain ultras.

The platform describes its service as 100% free and says it does not resell user data. It also provides personal agenda tools and invites runners to join and contribute to its trail-running community